Process of printing cotton.



NNO. 722,050. N i PATENTEIS MANB, 1903V f F. SGHAAB. N

`TROGBNS 0T PRINTING COTTON.

APPLICATION :H LBD JAN. 25, 1902.`

"LIo Konin.

` .ATTORNEYS To all whom, it may concern:

FRANZ SCHAAB, VF TRIER, GERMANY.`

success er Palerme correu.

PECIFICATIO forming part of `Letters Patent No. 722,050, dated March 3,1963. l Application led January 25,1902. Serial No. 91.252. (Nospecimens.)

Be it known that l, FRANZ SOHAAB, of Trier,

in the Empire of Germany, haveinyented certain new and usefulImprovements in Processes of Printing Cotton Fabrics, 'of which thefollowing is a specification.

This invention relates to an improved process for printing fabrics ofcotton or other vegetable iiber in white or colored designs. It washeretofore impossible to produce by the employment ofdyestuffs used inan alkaline Y solution-for example, the socalled sulfur dyestheseeffects, for the reason thatthe resists known and/employed did notpossess stimulent resistance tojwithstand the continu ons passagethrough the dye-baths.

Theobject of the present invention is to provide a process by which thisdiihculty is overcome; and for this purpose the invention consists inprinting the fabric with a suitable resist of any common orwelhknowncompo- 1' sition--such, for instance, as that hereiuafterdescribed-treating said resist imprinted on the goods with a solution ofa suitable alkali, then thoroughly drying the goods, and then dyeing thesame in an alkaline bath.

When a resist of the ordinary composition is printed on cotton or othervegetable liber and then subjected tothe action of a solution of analkali carbonate and subsequently d ried, it is rendered capableofresisting success` fully the continuous hydrosuliite-soda(hydrosulfit-natron) bath. In place of an alkali carbonatea'caustic-alkali or other alkaline salt, or salts may be used. In.allcases, how-` eveii', it is necessary for the production of anedeftive resist that after the treatment of the resist by the alkalinesolution the goods are thoroughly dried. When partly dry or moist,I itdoes not sufficiently` resist the inzliuence of the bath, and thedesired result is not obtained. For the resist a mixture of soluble leador copper salts, common pipe-clay, lead sulfate, and `a thickeningagent,such as any suitable gum, can be used. In place of the lead or coppersalts other salts, such as zinc or manganese salts, may be employed andyield similar resulta After the fabric has been printed by suitablerolls with the resist and treated by splashing thoroughly with thealkaline solution and `the resist is only/H then completely dried thegoods are dyediin an alkaline bath in the usual manner withif indigo orother color; protected by the resist appear in clear white The undyedportions and produce clear effects. Before the fabrics;

In place of the White* be produced when the fabrics are passedl afterthe dyeing `through Ya solution of bichromate of potash.-

In the accompanying drawing, which shows a pieceof goods dyed accordingto the im 'proved process, c1l a indicate portions pro `tected -hy theresist, and b the portion dyed in the dye-bath. p l

In practically carrying out my improved process the cotton fabric is stprinted in y any approved 'manner with a resist, which may bc ofthefollowing composition :l twenty kilograms of lead sulfate in pasteform,twelve and one-half kilograms of lead nitrate, seven and one-halfkilograms of sugar oli-lead, three kilograms cuprio sulfate, sixliters'cupric ni`I trate, three kilograms alum, three kilogramsleiogomme, four kilograms lightly-burned starch, eight kilograms of asolution of suitable gum, an donehalf kilogram tallow. The fabric isdried after printing and then saturated, as by spraying .or splashing,with a concentrated aqueous solution of potash, (specific gravityljt.)Itis then thoroughly dried and then palssed through a dye-bath, whichcontains, pe one hundred liters, two kilograms of a suitable blue,suchest at known as fimmedialblue OR, one klogram sodium sulfd, one-hallkilogram soda- ,lye of 40 Baume, and two kilogram common saltsl"Iheffabric is then steamed; if ncoessary, washed, acidified, anddried.:

. It the fabrics are to be dyed alsoinindigo,"

they are not requiredto be washed and acidi fied before dyeing withindigo..` The latter step canrbe accomplished directly in' the 'usualhydrosullit-soda bath;v After thcindigo-'bath is applied to the fabricsthey` aref acidied, Washed, and dried. f f

The process described lproduces a blue roo 'ground with White desigms.`It designs in' -a encon claim es new `aand desire to secure by Lettersl. The process herein described of printing cotton fabrics, whichconsists in printing on the fabric a resist 'containing metallic salts,then spraying 'the fabric with a solution of en alkaline carbonate, thenthoroughly drying the fabric, then dyeing the same with a sulfurdyeetui, and subsequently dyeing the seme with inigo in an alkalinebeth, snbi etentieliy es eet forth. y

2. The process herein described of printing cotton fabrics, whichconsists in printing on the fabric al resiet containing metallic seits,then spraying the fabric with a solution of an alkaline carbonate, thenthoroughly drying the fabric, then yeing the seme with' e sulfur dyestnlin an alkaline bath, then dyeing the saine with indigo in en alkalinebath, and then passing the same through a bichromate solution,substantially as set forth?- ln testimony that I claim the foregoing asmy invention l have signed my name in presence of two subecribingWitnesses.

(FRANZ sonerie.

Vitnesnes: t

ADOLPH SIMPLE, CARL, Soni/IWT.

